CN107737954A - Electro spindle and its drag link mechanism - Google Patents
Electro spindle and its drag link mechanism Download PDFInfo
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- CN107737954A CN107737954A CN201710985718.4A CN201710985718A CN107737954A CN 107737954 A CN107737954 A CN 107737954A CN 201710985718 A CN201710985718 A CN 201710985718A CN 107737954 A CN107737954 A CN 107737954A
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- pull bar
- spring
- shaft core
- link mechanism
- drag link
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- 235000015170 shellfish Nutrition 0.000 claims description 4
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- 238000007906 compression Methods 0.000 description 16
- 230000007812 deficiency Effects 0.000 description 8
- 238000000703 high-speed centrifugation Methods 0.000 description 8
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
- B23Q3/1552—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling parts of devices for automatically inserting or removing tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
Abstract
The invention discloses a kind of drag link mechanism of electro spindle and electro spindle.Drag link mechanism includes：Shaft core, shaft core have axially through endoporus；Pull bar, pull bar have relative top and bottom, and pull bar is provided with projection on the outer peripheral face of upper end, and the lower end of pull bar and projection are in the endoporus of shaft core；Spring capping, spring capping are fixed in the endoporus of shaft core, and spring capping is set on pull bar and between the lower end of pull bar and projection；Spring assembly, spring assembly is placed in the endoporus of shaft core, spring assembly includes at least one left-handed Belleville washer formula cylindrically coiled spring and at least one dextrorotation Belleville washer formula cylindrically coiled spring, left-handed Belleville washer formula cylindrically coiled spring and dextrorotation Belleville washer formula cylindrically coiled spring are set on pull bar, and the both ends of spring assembly abut the projection and spring capping of pull bar respectively.Above-mentioned drag link mechanism has accurate dynamic balance structure, can effectively increase the service life.
Description
Technical field
The present invention relates to electrical spindle for machine tool technical field, more particularly to a kind of drag link mechanism of electro spindle and use the pull bar
The electro spindle of mechanism.
Background technology
With the demand that economic development and technology soar, increasing new technology continues to bring out, mechanical processing industry
It is being a dark horse, especially the main shaft industry technology of position oneself at the forefront is innovated clearly.With Aero-Space (aluminium alloy,
Titanium alloy), automobile, precision die (graphite electrode, red copper electrode), heavy industry (heavy castings, steel part), 3C (aluminium alloy, modeling
Material) etc. requirement of the industry to processing efficiency, processing cost and machining accuracy, the emphasis of spindle processing is toward finishing, rotating speed is fast, table
Precision high direction in face is developed.
Wherein, drag link mechanism restricts electricity as the core part of high-speed electric main shaft automatic tool changer technology because various deficiencies turn into
One of bottleneck of main shaft high speed precision and run stability, so as to directly constrain application of the electro spindle in the high-precision occasion of bloom,
These defects turn into the improved developing direction of elastic draw bar mechanism simultaneously.
Specifically, there is following defect in existing drag link mechanism：
(1) flexible member life-span deficiency.
Drag link mechanism is generally used as the power resources of electro spindle clamping handle of a knife or chuck, mesh by the use of the restoring force of flexible member
Before, a variety of machining functions of machining center set, Tool Magazine in Machining Centers capacity is big, tens of handle of a knife at least, at most up to a hundred handle of a knife.
Such as machining center milling, brill, rigid tapping entirety Combined Machining Technology, domestic demand repeatedly changes cutter in short-term, and center of attacking is bored in part will be
Cutter changing is completed in 0.5S.The tool changing operation of high frequency directly results in flexible member overload work, ultimately results in service life contracting
It is short, and then fail.
(2) rigidity deficiency.
Drag link mechanism generally by the use of the restoring force of flexible member as the power resources of electro spindle clamping handle of a knife or chuck, and bullet
Property element more from disk spring, cylindrically coiled spring.
Wherein, disk spring is also known as Belleville washer, abbreviation disc spring, and disk spring advantage is：Low row journey can be realized
High balancing force, stroke is short, load is heavy, vibration absorbing performance is strong, is suitable for the small occasion of axial space.The absorbing principle of disk spring exists
In the disc spring overlapped in groups because the friction between disc spring piece has larger damping, and damped at double because of the disc spring with multigroup overlapping
Increase, so as to the impact energy that dissipates, compression ratio is small, long lifespan.Disk spring shortcoming is：To obtain enough restoring forces, dish
Spring needs multigroup overlapping, and the flexible member as drag link mechanism can cause：1) frictional force increases, and reduces the restoring force of flexible member；
2) in the electro spindle not criminal manipulation of acceleration and the deceleration of clamping handle of a knife high acceleration, these criminal manipulations can cause disc spring phase
Pull bar external diameter is rotated, the disc spring quantity that disc spring piece quantity rotates when larger accordingly increases, and ultimately results in remaining imbalance
Position changes.
Cylindrically coiled spring divides by type to be divided into：Circular cross-section cylindroid helical-coil compression spring, square-section cylindrical screw
Compression spring, oblong profile cylindroid helical-coil compression spring etc..Cylindrically coiled spring advantage is：Dimensional accuracy is high, and rigidity is stable.
Cylindrically coiled spring shortcoming is：Compression ratio is big, and the life-span is relatively short, therefore, required stroke ratio dish in the case of equal restoring force
Shape spring is grown, and it is long that the flexible member as drag link mechanism eventually results in pull bar length.
In summary, the existing flexible member course of work is likely to occur eccentric clamping stagnation, frictional force increase, causes flexible member
Restoring force loses, and the chucking power deficiency of electro spindle clamping handle of a knife or chuck, ultimately results in electro spindle broaching tool system rigidity deficiency.
(3) dynamic balancing is influenceed.
1) flexible member deforms under high speed centrifugation power causes centroid motion；2) common cylinder helical spring is deposited when being pressurized
In a revolving force opposite with the hand of spiral, compression, internal diameter and external diameter are big with time-varying, influence electro spindle balance quality.
The content of the invention
For overcome the deficiencies in the prior art, an object of the present invention is to provide a kind of drag link mechanism of electro spindle,
The drag link mechanism can effectively increase the service life, and improve the rigidity of electro spindle broaching tool system, and with accurate dynamic balance structure.
The second object of the present invention is to provide a kind of electro spindle using above-mentioned drag link mechanism.
An object of the present invention is realized using following technical scheme：
A kind of drag link mechanism of electro spindle, including：
Shaft core, the shaft core have axially through endoporus；
Pull bar, the pull bar have relative top and bottom, and the pull bar is provided with convex on the outer peripheral face of upper end
Rise, the lower end of the pull bar and projection are in the endoporus of the shaft core；
Spring capping, the spring capping are fixed in the endoporus of the shaft core, and the spring capping is set in the drawing
On bar and between the lower end of the pull bar and projection；
Spring assembly, the spring assembly are placed in the endoporus of the shaft core, and the spring assembly includes at least one
Left-handed Belleville washer formula cylindrically coiled spring and at least one dextrorotation Belleville washer formula cylindrically coiled spring, the left side
Rotation Belleville washer formula cylindrically coiled spring and the dextrorotation Belleville washer formula cylindrically coiled spring are set in the drawing
On bar, the both ends of the spring assembly abut the raised and described spring capping of the pull bar respectively.
Alternatively, the spring assembly includes multiple left-handed Belleville washer formula cylindrically coiled springs and multiple dextrorotation shellfishes
Le Weier washer type cylindrically coiled springs, the left-handed Belleville washer formula cylindrically coiled spring and the dextrorotation Belleville
Washer type cylindrically coiled spring is alternately set on the pull bar.
Alternatively, the spring assembly includes at least one first groups of springs and at least one second spring group, and described
One groups of springs includes multiple left-handed Belleville washer formula cylindrically coiled springs, and the second spring group includes multiple dextrorotation Beiles
Wei Er washer type cylindrically coiled springs, first groups of springs and the second spring group are alternately set on the pull bar.
Alternatively, the spring assembly includes first groups of springs, a second spring group and sliding sleeve, and the sliding sleeve holds
It is placed in the endoporus of the shaft core, the sliding sleeve is slidably located on the pull bar and positioned at first groups of springs and described the
Between two groups of springs.
Alternatively, at least one be slidably located on the pull bar is provided between the sliding sleeve and first groups of springs
Pad.
Alternatively, at least one pad being set on the pull bar is provided between the sliding sleeve and the second spring group
Piece.
Alternatively, in addition to pulling claw, the pulling claw are placed in the endoporus of the shaft core, and one end of the pulling claw is set in
On the outer peripheral face of the lower end of the pull bar, the pull bar it is raised between the inner peripheral surface of the shaft core, the sliding sleeve with it is described
Between the inner peripheral surface of shaft core, between the outer peripheral face of the spring capping and pull bar, the outer peripheral face of the pulling claw and the shaft core
It is the support that is slidably matched between inner peripheral surface.
Alternatively, be slidably matched with the inner peripheral surface of the shaft core support the pull bar raised outer peripheral face on have from
Lubricating and wear-resisting coating, being slidably matched with the spring capping on the outer peripheral face of the pull bar of support, there is self-lubricating abrasion-resistant to apply
Layer.
Alternatively, the pull bar it is raised between the shaft core, between the pull bar and the pulling claw, the pulling claw with
Resilient, elastomeric is provided between the shaft core.
Alternatively, in addition to toothed disc, the toothed disc include the body with through hole and the annular portion with through hole, institute
The one end for stating annular portion is located in the through hole of the body, the body of the toothed disc fix be set in the shaft core with it is described
Corresponding to the upper end of pull bar on the outer peripheral face of end, the annular portion of the toothed disc is set on the pull bar and is located at the drawing
To stop that the projection of the pull bar departs from the endoporus of the shaft core between the upper end of bar and projection.
Alternatively, the screw radially extended is provided with the annular portion, limited location is set in the screw of the annular portion
Screw, the groove corresponding with the stop screw is provided with the outer peripheral face between the upper end of the pull bar and projection, it is described
The bottom of stop screw and the groove of the pull bar has gap.
Alternatively, there is profit on the inner peripheral surface of the shaft core between the projection of the spring capping and the pull bar
Grease way.
Alternatively, the grease trough extends in the shape of a spiral on the inner peripheral surface of the shaft core.
Alternatively, in addition to back-up ring, the back-up ring are placed in the endoporus of the shaft core, and the back-up ring is fixed and is set in institute
State on pull bar and stop the spring capping between the pull bar and the spring capping and the spring assembly ejects.
Alternatively, there is inner shoulder table, the outer peripheral face of the spring capping has outer shoulder, institute on the inner peripheral surface of the shaft core
The outer shoulder for stating spring capping is connected on the inner shoulder table of the shaft core.
Alternatively, the spring capping and the inner peripheral surface of the shaft core are interference fitted.
The second object of the present invention is realized using following technical scheme：
A kind of electro spindle, the electro spindle include the drag link mechanism described in above-mentioned any one.
Compared with prior art, the beneficial effects of the present invention are：
The present invention includes at least one left-handed Belleville washer formula cylindrically coiled spring by being used in drag link mechanism
, can be in the case of high speed centrifugation by pull bar with the spring assembly of at least one dextrorotation Belleville washer formula cylindrically coiled spring
Be effectively fixed in inside shaft core, and the axiality with shaft core can be kept, the drag link mechanism can keep high dynamic balance performance and
Assembly precision, the compression ratio of spring assembly is small, stroke is short, load is heavy, pull bar draw ratio is small, and security is done and has high make
With life-span (Comprehensive service life of the drag link mechanism is up to 2,000,000 second compressions), it is fully able to meet that high-speed electric main shaft adds at a high speed
Work precision, highly dynamic run stability energy and quickly open, stop demand.
Brief description of the drawings
Fig. 1 is the schematic cross-section of the drag link mechanism of the embodiment of the present invention.
Fig. 2 is the structural representation of the left-handed Belleville washer formula cylindrically coiled spring of the embodiment of the present invention.
Fig. 3 is the enlarged drawing of S1 parts in Fig. 1.
Fig. 4 is the enlarged drawing of S2 parts in Fig. 1.
In figure：
10：Shaft core
11：Endoporus 12：Grease trough
13：Inner shoulder table
20：Pull bar
20a：Upper end 20b：Lower end
21：Projection 22：Groove
23：Pull-rod nut
30：Spring capping 31：Outer shoulder
40：Spring assembly
40a：First groups of springs 40b：Second spring group
41：Left-handed Belleville washer formula cylindrically coiled spring
42：Dextrorotation Belleville washer formula cylindrically coiled spring
43：The pad of sliding sleeve 44
50：Pulling claw
60：Toothed disc
61：Body 62：Annular portion
63：Stop screw
70：Resilient, elastomeric 80：Back-up ring
Embodiment
Below, with reference to accompanying drawing and embodiment, the present invention is described further, it is necessary to which explanation is, not
Under the premise of afoul, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
Referring to figs. 1 to Fig. 4, on the one hand, the present invention provides a kind of drag link mechanism of electro spindle, and the drag link mechanism includes shaft core
10th, pull bar 20, spring capping 30 and spring assembly 40.
Shaft core 10 have axially through endoporus 11, the endoporus 11 connect shaft core 10 top and bottom.
Pull bar 20 has relative upper end 20a and lower end 20b, and pull bar 20 is provided with convex on upper end 20a outer peripheral face
21 are played, the lower end 20b and projection 21 of pull bar 20 are in the endoporus 11 of shaft core 10.In the present embodiment, the upper end 20a of pull bar 20 with
The upper end of shaft core 10 is corresponding, and the lower end 20b of pull bar 20 is corresponding with the lower end of shaft core 10, the upper end 20a protrusion shaft cores 10 of pull bar 20
Endoporus 11, the upper end 20a of pull bar 20 is used to receive external pressure, the axial compressive force of the broaching tool cylinder application such as from electro spindle,
Pull bar 20 pushes after being pressurized, and the lower end 20b of pull bar 20 is used to be connected with the pulling claw 50 of electro spindle, by pull bar 20 push and on
Row carries out tool changing and broaching tool operation respectively.
Spring capping 30 is fixed in the endoporus 11 of shaft core 10, and spring capping 30 is set on pull bar 20 and is located at pull bar 20
Lower end 20b and projection 21 between, pull bar 20 push with it is up during, pull bar 20 slides relative to spring capping 30.
Spring assembly 40 is placed in the endoporus 11 of shaft core 10, and spring assembly 40 includes at least one left-handed Belleville pad
Ring type cylindrically coiled spring 41 and at least one dextrorotation Belleville washer formula cylindrically coiled spring 42, left-handed Belleville washer
Formula cylindrically coiled spring 41 and dextrorotation Belleville washer formula cylindrically coiled spring 42 are set on pull bar 20, spring assembly 40
Both ends abut the projection 21 and spring capping 30 of pull bar 20 respectively.
Reference picture 2, Belleville washer formula cylindrically coiled spring are on the basis of oblong profile cylindroid helical-coil compression spring
Pattern by its Cross section Design into Belleville washer, Belleville washer formula cylindrically coiled spring of the invention include left-handed shellfish
Le Weier washer types cylindrically coiled spring 41 and dextrorotation Belleville washer formula cylindrically coiled spring 42, the left-handed Belleville pad
Ring type cylindrically coiled spring 41 and dextrorotation Belleville washer formula cylindrically coiled spring 42 it is oppositely oriented, by above two rotation direction
Opposite Belleville washer formula cylindrically coiled spring is set in overlap on pull bar 20 and used, when being pushed after the compression of pull bar 20,
The trend that a caused past direction rotates during pushing can be offset.Fig. 2 is the left-handed Belleville of the embodiment of the present invention
The structural representation of washer type cylindrically coiled spring, in Fig. 2, S3 partially illustrates left-handed Belleville washer formula cylindrical screw bullet
The cross section structure of spring.
The Belleville washer formula cylindrically coiled spring answers the operation principle of Belleville washer and cylindrically coiled spring
Synthesize an entirety, both with cylindrically coiled spring dimensional accuracy it is high the advantages of, combine and pushed in the course of work in disc spring again
The characteristics of circle diminishes, cylindrically coiled spring inner ring is constant big, final inner ring size keep constant, reduce the friction with pull bar 20
Power.
There is Belleville washer formula cylindrically coiled spring the advantages of cylindrically coiled spring dimensional accuracy is high to cause groups of springs
Part 40 can keep high restoring force and the chucking power of electro spindle clamping handle of a knife or chuck, and then have electro spindle broaching tool system
Higher rigidity.
Belleville washer formula cylindrically coiled spring makes that precision-fit can be realized between spring assembly 40 and pull bar 20, tool
There is the dynamic balance structure of precision.Specifically, high speed centrifugation power and high frequency release compression operating mode under can guarantee that barycenter overlap and
It is not eccentric, prevent centroid motion, frictional force is small, and stability and reliability are higher, the broaching tool system especially suitable for high-speed electric main shaft
System；Meanwhile above-mentioned Belleville washer formula cylindrically coiled spring is again with the low row journey of Belleville washer, high balancing force, suitable
The characteristics of together in axial space small occasion, in drag link mechanism, low row journey and high balancing force to cause the whole of pull bar 20 itself
Body size is shortened, and draw ratio is reduced, and bending of the pull bar 20 under the effect of high speed centrifugation power itself can be reduced, so as to ensure barycenter
Overlap and meet requirement for dynamic balance.
In addition, Belleville washer formula cylindrically coiled spring has the characteristics of small disc spring compression ratio, long lifespan, make its special
It is suitable for needing the High Speed NC Machine Tools occasion of the tool changing operation of high frequency.
In one embodiment, spring assembly 40 includes multiple left-handed Belleville washer formula cylindrically coiled springs 41 and more
Individual dextrorotation Belleville washer formula cylindrically coiled spring 42, left-handed Belleville washer formula cylindrically coiled spring 41 and dextrorotation Beile
Wei Er washer types cylindrically coiled spring 42 is alternately set on pull bar 20, in other words, the two neighboring shellfish being set on pull bar 20
Le Weier washer type cylindrically coiled springs it is oppositely oriented, pull bar 20 compression after push when, the spring assembly 40 of above-mentioned arrangement
It is more beneficial for the trend that a caused past direction rotates during counteracting pushes.
In one embodiment, spring assembly 40 includes at least one first groups of springs 40a and at least one second spring
Group 40b, the first groups of springs 40a include multiple left-handed Belleville washer formula cylindrically coiled springs 41, and second spring group 40b includes
Multiple dextrorotation Belleville washer formula cylindrically coiled springs 42, the first groups of springs 40a and second spring group 40b are alternately set in drawing
On bar 20, in other words, the adjacent multiple left-handed Belleville washer formula cylindrically coiled springs 41 of rotation direction identical are divided into
One groups of springs 40a, the adjacent multiple dextrorotation Belleville washer formula cylindrically coiled springs 42 of rotation direction identical are divided into second
Groups of springs 40b, Belleville washer formula cylindrically coiled spring in two neighboring groups of springs it is oppositely oriented, be pressurized in pull bar 20
After when pushing, the spring assembly 40 of above-mentioned arrangement is equally beneficial for offsetting push during becoming of rotating of a caused past direction
Gesture.
In a specific embodiment, in drag link mechanism as shown in Figure 1, spring assembly 40 includes first groups of springs
40a, a second spring group 40b and sliding sleeve 43, sliding sleeve 43 are placed in the endoporus 11 of shaft core 10, and sliding sleeve 43 is slidably located in drawing
On bar 20 and between the first groups of springs 40a and second spring group 40b.In the present embodiment, the first groups of springs 40a both ends point
Not Di Jie sliding sleeve 43 and spring capping 30, the first groups of springs 40a includes multiple left-handed Belleville washer formula cylindrically coiled springs
41；Second spring group 40b both ends abut the projection 21 of sliding sleeve 43 and pull bar 20 respectively, and second spring group 40b includes multiple right sides
Revolve Belleville washer formula cylindrically coiled spring 42.As alternative embodiment, the first groups of springs 40a and second spring group 40b's
Position can be exchanged, and in other words, the first groups of springs 40a both ends abut the projection 21 of sliding sleeve 43 and pull bar 20, the second bullet respectively
Spring group 40b both ends abut sliding sleeve 43 and spring capping 30 respectively, and the spring assembly 40 of the arrangement is likewise covered by the present invention's
In protection domain.When being pushed after the compression of pull bar 20, the spring assembly 40 of above-mentioned arrangement is equally beneficial for during counteracting pushes
The trend that a caused past direction rotates.
Alternatively, it is provided with least one pad being slidably located on pull bar 20 between the groups of springs 40a of sliding sleeve 43 and first
Piece 44, the first groups of springs 40a can be adjusted by increasing and decreasing the quantity of pad 44 being arranged between the groups of springs 40a of sliding sleeve 43 and first
In multiple left-handed Belleville washer formula cylindrically coiled springs 41 decrement, and then adjust drag link mechanism under broaching tool state
Restoring force size.
Alternatively, at least one pad 44 being set on pull bar 20 is provided between sliding sleeve 43 and second spring group 40b,
By increasing and decreasing, the quantity of pad 44 that is arranged between sliding sleeve 43 and second spring group 40b is same can to adjust second spring group 40b
In multiple dextrorotation Belleville washer formula cylindrically coiled springs 42 decrement, and then adjust drag link mechanism under broaching tool state
Restoring force size.
In existing drag link mechanism, on the one hand, the when strong point design of the major diameter of pull bar 20 is unreasonable, in high speed centrifugation power
Easily cause bending eccentric under effect, so as to influence the dynamic balance performance of electro spindle；On the other hand, pull bar 20 is with being used as inclusion body
Shaft core 10 to be slidably matched, or the existing face that is slidably matched is excessive, or it is very few.Wherein, be slidably matched face it is excessive when, it is more
Individual supporting surface formed positioning, caused frictional force excessive, and the restoring force for ultimately resulting in flexible member loses, at whole drag link mechanism
Tightening force deficiency when loose state, low speed, during high speed centrifugation rock to even result in and produce pull bar 20 and fly out the danger hurted sb.'s feelings；
Be slidably matched face it is very few when, supporting surface support force deficiency, cause high speed centrifugation power act under, drag link mechanism deformation, influence to move
Balance quality, the part in drag link mechanism after deformation is not coaxial, frictional force increase, causes to fail.
In view of the above-mentioned problems, in one embodiment, drag link mechanism also includes pulling claw 50, pulling claw 50 is placed in shaft core 10
In endoporus 11, one end of pulling claw 50 is set on the lower end 20b outer peripheral face of pull bar 20, projection 21 and the shaft core 10 of pull bar 20
Between inner peripheral surface, between the inner peripheral surface of sliding sleeve 43 and shaft core 10, between the outer peripheral face of spring capping 30 and pull bar 20, pulling claw 50
It is the support that is slidably matched between outer peripheral face and the inner peripheral surface of shaft core 10.As described above, the spring assembly 40 of the present invention uses Beile
Wei Er washer types cylindrically coiled spring can make the overall dimensions of of pull bar 20 itself shorten, and draw ratio is reduced, whole in the present embodiment
Individual drag link mechanism only sets 4 distances to be as above suitably slidably matched face as the strong point, the position at the neighbouring both ends of pull bar 20
Put has the strong point respectively, and the center section of pull bar 20 has two strong points, and above-mentioned 2 points are able to ensure that pull bar 20 at a high speed
Degree of crook is reduced to minimum under centrifugal action, while can ensure the axiality requirement of positioning, the drag link mechanism of the structure
It is reasonable in design, there is accurate dynamic balance structure, can effectively meet the dynamic balance performance requirement of electro spindle.
Alternatively, be slidably matched with the inner peripheral surface of shaft core 10 support pull bar 20 projection 21 outer peripheral face on have from moisten
Sliding wear-resistant coating (not shown), being slidably matched with spring capping 30 on the outer peripheral face of the pull bar 20 of support, there is self-lubricating abrasion-resistant to apply
Layer (not shown), above-mentioned self-lubricating wear-resistant coating improves abrasion hardness using surface peening heat treatment, and adds self-lubricating material
So that coating is more wear-resisting, the self-lubricating wear-resistant coating can effectively reduce frictional force, increase the service life.
In one embodiment, drag link mechanism also includes toothed disc 60.Toothed disc 60 includes the He of body 61 with through hole
Annular portion 62 with through hole, one end of annular portion 62 are located in the through hole of body 61, and the body 61 of toothed disc 60, which is fixed, to be arranged
On the outer peripheral face of the end corresponding with the upper end 20a of pull bar 20 of shaft core 10, the annular portion 62 of toothed disc 60 is set in pull bar
On 20 and it is located between the upper end 20a of pull bar 20 and projection 21 to stop that the projection 21 of pull bar 20 departs from the endoporus 11 of shaft core 10.
The part radially extended of annular portion 62 is connected on the upper surface of shaft core 10, under the broaching tool state of pull bar 20, annular portion 62
The upper surface of protrusion shaft core 10 radially extended part abut pull bar 20 projection 21, stop pull bar 20 continue to move up,
Play position-limiting action.
Alternatively, the screw radially extended is provided with annular portion 62, stop screw is provided with the screw of annular portion 62
The groove 22 corresponding with stop screw 63 is provided with outer peripheral face between 63, the upper end 20a of pull bar 20 and projection 21, it is spacing
The bottom of screw 63 and the groove 22 of pull bar 20 has gap.The groove 22 of above-mentioned stop screw 63 and pull bar 20 is engaged,
When drag link mechanism is under abnormal state, as criminal manipulation not the acceleration and deceleration of clamping handle of a knife high acceleration when, or normally
During use, it is ensured that the upper end 20a of pull bar 20 is not swung, and ensures axiality requirement, meets the dynamic balance of electro spindle
It can require.
In one embodiment, have on the inner peripheral surface of the shaft core 10 between spring capping 30 and the projection 21 of pull bar 20
There is grease trough 12, injection lubricating grease, can reduce the spring assembly 40 and axle arranged on pull bar 20 in the grease trough 12
Frictional force between the inner peripheral surface of core 10.Grease trough 12 can be provided in the annular groove on the inner peripheral surface of shaft core 10, preferably
Ground, grease trough 12 extend in the shape of a spiral on the inner peripheral surface of shaft core 10, and the grease trough 12 of the structure can be to being axially arranged
Multiple left-handed Belleville washer formula cylindrically coiled springs 41 and multiple dextrorotation Belleville washer formula cylinders on pull bar 20
Helical spring 42 is lubricated.
In one embodiment, between the projection 21 and shaft core 10 of pull bar 20, between pull bar 20 and pulling claw 50, pulling claw 50 with
Resilient, elastomeric 70 is provided between shaft core 10.The 70 special choice arrangement of resilient, elastomeric of the present embodiment is on the top of drag link mechanism
And bottom, the material of resilient, elastomeric 70 is flexible, can play centering effect, while matter can be reduced during high-speed cruising
The influence of heart skew, degradation drag link mechanism slide up and down during noise, additionally it is possible to prevent from lubricating in grease trough 12
Fat is to outward leakage, so as to avoid friction from deteriorating.
In one embodiment, drag link mechanism also includes back-up ring 80, and back-up ring 80 is placed in the endoporus 11 of shaft core 10, back-up ring
80 fixations are set on pull bar 20 and stop spring capping 30 and spring assembly 40 between pull bar 20 and spring capping 30
Ejection.In the present embodiment, back-up ring 80 is fixed and is set on pull bar 20, is wrapped up outside back-up ring 80 by spring capping 30, in electro spindle
During high-speed cruising, the gap bullet of spring capping 30 and spring assembly 40 between back-up ring 80 and shaft core 10 can be effectively prevented
Go out, so as to reduce the risk for causing personal injury.It is preferred that back-up ring 80 is elastic spring.
In one embodiment, there is inner shoulder table 13, the outer peripheral face of spring capping 30 is with outer on the inner peripheral surface of shaft core 10
Shoulder 31, the outer shoulder 31 of spring capping 30 are connected on the inner shoulder table 13 of shaft core 10.During tool changing and broaching tool, pass through bullet
The elastic reaction of spring component so that the outer shoulder 31 of spring capping 30 is connected on the inner shoulder table 13 of shaft core 10, reaches spring pressure
Lid 30 is fixed on the purpose in the endoporus 11 of shaft core 10.In an alternative embodiment, spring capping 30 and the inner peripheral surface of shaft core 10
Interference fit, the interference fit are equally reached the purpose that spring capping 30 is fixed in the endoporus 11 of shaft core 10.
Alternatively, drag link mechanism also includes the pull-rod nut 23 for being arranged on the upper end 20a of pull bar 20.
The exemplary course of work of drag link mechanism is described below.
Pull bar 20 pushes electro spindle and unloads knife：The axial compressive force applied by the knife striking cylinder (not shown) of electro spindle directly applies
On the pull-rod nut 23 of drag link mechanism under static state, pull-rod nut 23 is rigidly connected with the screw thread of pull bar 20, axial compressive force
Make the dextrorotation Belleville washer formula cylindrically coiled spring 42 of spring assembly 40 and left-handed Belleville washer formula cylindrical screw bullet
Spring 41 is compressed, while the entirety of pull bar 20 moves down, and after knife striking cylinder, which pushes, pull bar 20 is moved to distance to a declared goal, pulling claw 50 is released
Position is put into, in complete open configuration, automatic tool changer takes handle of a knife or collet chuck away from the taper hole of shaft core 10, now, electricity
Main shaft is in and unloads knife-like state.
The up electro spindle broaching tool of pull bar 20：Drag link mechanism in place after, handle of a knife or collet chuck are placed into axle by automatic tool changer
After on the taper hole of core 10, now, knife striking cylinder moves up, its apply axial compressive force start to reduce, until knife striking cylinder completely from
The pull-rod nut 23 of drag link mechanism is opened, its axial compressive force applied is zero.While knife striking cylinder moves up, because of spring assembly 40
The pressure that (dextrorotation Belleville washer formula cylindrically coiled spring 42, left-handed Belleville washer formula cylindrically coiled spring 41) is subject to
Reduce, in using for the selfer power of spring assembly 40, pull bar 20 synchronously moves up, and knife striking cylinder leaves drag link mechanism completely
Pull-rod nut 23 when, pull bar 20 equally reply in place, while drag link mechanism moves up in place drive pulling claw 50 receive
Position is tightened to, pulling claw 50 completes the action of clamping handle of a knife or collet chuck, and now, electro spindle is in broaching tool state.
When electro spindle is in broaching tool state, after lathe entry condition is ready, electro spindle can run well, electro spindle
Its handle of a knife or collet chuck produce great centrifugal force when rotating at a high speed, and pull bar 20 passes through (the dextrorotation Belleville pad of spring assembly 40
Ring type cylindrically coiled spring 42, left-handed Belleville washer formula cylindrically coiled spring 41) restoring force caused by pulling force overcome knife
Handle of a knife or collet chuck are securely held on the taper hole of shaft core 10 by the centrifugal force suffered by handle or collet chuck.
On the other hand, the present invention also provides a kind of electro spindle, and the electro spindle includes the drag link mechanism of any of the above-described embodiment.
To sum up, the present invention includes at least one left-handed Belleville washer formula cylindrical screw by being used in drag link mechanism
The spring assembly of spring and at least one dextrorotation Belleville washer formula cylindrically coiled spring, it can be incited somebody to action in the case of high speed centrifugation
Pull bar is effectively fixed in inside shaft core, and can keep the axiality with shaft core, and the drag link mechanism can keep high dynamic balance
Can and assembly precision, the compression ratio of spring assembly is small, stroke is short, load is heavy, pull bar draw ratio is small, and security is done and had high
Service life (Comprehensive service life of the drag link mechanism is up to 2,000,000 second compressions), be fully able to meet high-speed electric main shaft height
Fast machining accuracy, highly dynamic run stability energy and quickly open, stop demand.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
Corresponding change and deformation, and all these changes and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (17)
- A kind of 1. drag link mechanism of electro spindle, it is characterised in that including：Shaft core, the shaft core have axially through endoporus；Pull bar, the pull bar have relative top and bottom, and the pull bar is provided with projection, institute on the outer peripheral face of upper end The lower end and projection for stating pull bar are located in the endoporus of the shaft core；Spring capping, the spring capping are fixed in the endoporus of the shaft core, and the spring capping is set on the pull bar And between the lower end of the pull bar and projection；Spring assembly, the spring assembly are placed in the endoporus of the shaft core, and the spring assembly includes at least one left-handed Belleville washer formula cylindrically coiled spring and at least one dextrorotation Belleville washer formula cylindrically coiled spring, the left-handed shellfish Le Weier washer types cylindrically coiled spring and the dextrorotation Belleville washer formula cylindrically coiled spring are set on the pull bar, The both ends of the spring assembly abut the raised and described spring capping of the pull bar respectively.
- 2. drag link mechanism as claimed in claim 1, it is characterised in that the spring assembly includes multiple left-handed Belleville pads Ring type cylindrically coiled spring and multiple dextrorotation Belleville washer formula cylindrically coiled springs, the left-handed Belleville washer formula circle Post helical spring and the dextrorotation Belleville washer formula cylindrically coiled spring are alternately set on the pull bar.
- 3. drag link mechanism as claimed in claim 1, it is characterised in that the spring assembly includes at least one first groups of springs With at least one second spring group, first groups of springs includes multiple left-handed Belleville washer formula cylindrically coiled springs, institute Stating second spring group includes multiple dextrorotation Belleville washer formula cylindrically coiled springs, first groups of springs and second bullet Spring group is alternately set on the pull bar.
- 4. drag link mechanism as claimed in claim 3, it is characterised in that the spring assembly includes the first groups of springs, one Individual second spring group and sliding sleeve, the sliding sleeve are placed in the endoporus of the shaft core, and the sliding sleeve is slidably located in the pull bar Above and between first groups of springs and the second spring group.
- 5. drag link mechanism as claimed in claim 4, it is characterised in that be provided between the sliding sleeve and first groups of springs At least one pad being slidably located on the pull bar.
- 6. the drag link mechanism as described in claim 4 or 5, it is characterised in that set between the sliding sleeve and the second spring group It is equipped with least one pad being set on the pull bar.
- 7. drag link mechanism as claimed in claim 4, it is characterised in that be also placed in the shaft core including pulling claw, the pulling claw Endoporus in, one end of the pulling claw is set on the outer peripheral face of the lower end of the pull bar, the raised and axle of the pull bar Between the inner peripheral surface of core, between the inner peripheral surface of the sliding sleeve and the shaft core, between the outer peripheral face of the spring capping and pull bar, It is the support that is slidably matched between the outer peripheral face of the pulling claw and the inner peripheral surface of the shaft core.
- 8. drag link mechanism as claimed in claim 7, it is characterised in that the institute for the support that is slidably matched with the inner peripheral surface of the shaft core Stating has self-lubricating wear-resistant coating on the raised outer peripheral face of pull bar, the pull bar for the support that is slidably matched with the spring capping Outer peripheral face on there is self-lubricating wear-resistant coating.
- 9. drag link mechanism as claimed in claim 7, it is characterised in that the pull bar it is raised between the shaft core, it is described Resilient, elastomeric is provided between pull bar and the pulling claw, between the pulling claw and the shaft core.
- 10. drag link mechanism as claimed in claim 1, it is characterised in that also including toothed disc, the toothed disc includes having and led to The body in hole and the annular portion with through hole, one end of the annular portion are located in the through hole of the body, the toothed disc Body is fixed and is set on the outer peripheral face of end corresponding with the upper end of the pull bar of the shaft core, the annulus of the toothed disc Portion is set on the pull bar and stopped between the upper end of the pull bar and projection described in the raised disengaging of the pull bar The endoporus of shaft core.
- 11. drag link mechanism as claimed in claim 10, it is characterised in that the spiral shell radially extended is provided with the annular portion Hole, stop screw is provided with the screw of the annular portion, is provided with the outer peripheral face between the upper end of the pull bar and projection The groove corresponding with the stop screw, the bottom of the stop screw and the groove of the pull bar have gap.
- 12. drag link mechanism as claimed in claim 1, it is characterised in that positioned at the projection of the spring capping and the pull bar Between the shaft core inner peripheral surface on there is grease trough.
- 13. drag link mechanism as claimed in claim 12, it is characterised in that the grease trough is on the inner peripheral surface of the shaft core Extend in the shape of a spiral.
- 14. drag link mechanism as claimed in claim 1, it is characterised in that be also placed in the shaft core including back-up ring, the back-up ring Endoporus in, the back-up ring is fixed and is set on the pull bar and between the pull bar and the spring capping to stop State spring capping and spring assembly ejection.
- 15. drag link mechanism as claimed in claim 1, it is characterised in that there is inner shoulder table on the inner peripheral surface of the shaft core, it is described The outer peripheral face of spring capping has outer shoulder, and the outer shoulder of the spring capping is connected on the inner shoulder table of the shaft core.
- 16. drag link mechanism as claimed in claim 1, it is characterised in that the spring capping and the inner peripheral surface mistake of the shaft core It is full of cooperation.
- 17. a kind of electro spindle, it is characterised in that the electro spindle includes the draw-bar machine described in claim 1 to 16 any one Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710985718.4A CN107737954A (en) | 2017-10-20 | 2017-10-20 | Electro spindle and its drag link mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710985718.4A CN107737954A (en) | 2017-10-20 | 2017-10-20 | Electro spindle and its drag link mechanism |
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| Publication Number | Publication Date |
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| CN107737954A true CN107737954A (en) | 2018-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710985718.4A Pending CN107737954A (en) | 2017-10-20 | 2017-10-20 | Electro spindle and its drag link mechanism |
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| CN (1) | CN107737954A (en) |
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| CN109128953A (en) * | 2018-09-06 | 2019-01-04 | 广州市昊志机电股份有限公司 | A kind of anti-rotation structure of main spindle broach mechanism |
| CN110666686A (en) * | 2019-11-11 | 2020-01-10 | 安阳德一机床附件制造有限公司 | Tensioning mechanism of rear-pull main shaft |
| CN111112653A (en) * | 2019-12-23 | 2020-05-08 | 广州市昊志机电股份有限公司 | Dustproof electric spindle structure |
| CN111221300A (en) * | 2018-11-26 | 2020-06-02 | 大隈株式会社 | Numerical control device |
| CN111571269A (en) * | 2020-04-02 | 2020-08-25 | 广州市昊志机电股份有限公司 | Main shaft broach mechanism |
| CN113798917A (en) * | 2021-09-13 | 2021-12-17 | 深圳市速锋科技股份有限公司 | Center water outlet electric spindle broach mechanism and method for detecting air tightness of inner cavity of center water outlet electric spindle broach mechanism |
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| CN113798917B (en) * | 2021-09-13 | 2022-12-09 | 深圳市速锋科技股份有限公司 | Center water outlet electric spindle broach mechanism and method for detecting air tightness of inner cavity of center water outlet electric spindle broach mechanism |
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